Blood health

Inflammation

Red Cell Distribution Width Standard Deviation (RDW-SD)

What it measures

Complete Blood Count Test (CBC)

Clinical significance

The red cell distribution width (RDW) predicts mortality, including among cardiovascular, pulmonary, trauma, and other patients, and in the general population. RDW is the standard deviation (SD) of the red cell volume divided by the mean corpuscular volume (MCV). Because higher MCV also predicts mortality risk, it sonsidered that RDW-SD (the RDW numerator) predicts mortality more strongly than RDW.

A normal range for red cell distribution width is 12.2 to 16.1 percent in adult females and 11.8 to 14.5 percent in adult males. If you score outside this range, you could have a nutrient deficiency, infection, or other disorder. However, even at normal RDW levels, you may still have a medical condition.

What if red cell distribution width SD RDW-SD is high?

If your RDW is too high, it could be an indication of a nutrient deficiency, such as a deficiency of iron, folate, or vitamin B-12. These results could also indicate macrocytic anemia, when your body doesn't produce enough normal red blood cells, and the cells it does produce are larger than normal.

In general, red cell distribution width (RDW) has recently been associated with the risk of cardiovascular disease and all-cause mortality. The underlying mechanisms remain unresolved, but high levels of RDW may be caused by inflammation or poor nutritional status.

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My journey back to health with Healsens. Thank you!!

That's when I turned to a nutritionist and ordered a blood test through Healsens. … Four months later, I retested. My biological age dropped to 24—nearly a decade younger than my real age.

Anna A. · App Store

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Useful app to track analytics and 2nd opinion

It helps me track main parameters, understanding what do they mean and correlations, and make critical analysis to make preventative changes. Hope too see new fichas soon!

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Everything is great! Excellent app! It's very convenient for storing all your test results! The only thing I wish was that you could record blood pressure readings for both arms, as this is sometimes important for blood pressure monitoring.

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A useful app. It motivates me to lead a healthy lifestyle and monitor my diet. After the test results, I decided to change my diet – I cut out flour and chocolate. I lost 2 kg in about a week. We'll see how the test results look over time.

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